Originally Posted by clinebarger
Originally Posted by dlundblad
Originally Posted by clinebarger
Dexron VI will work fine in a '97 4L60E.....They are not far removed from '05 & up 4L60E's that had Dex VI as factory fill.
A TES-295 ATF is a synthetic Dexron III & works very well in these units......Summit Racing has Mobil Delvac 1 TES-295 ATF for $30.99 a gallon which is a really good price.
Use a factory GM# 08654799 gasket unless you like leaks! Torque to 120 inch pounds
I think I remember you bringing this up before so I apoligize if I asked before, but how do we know Delvac 1 is similar to DexIII? The PDS shows it being a tad thicker than Maxlife and other LV ATF's too which is nice. $30 a gallon though. Ouch.
I am not a fan of the multi vehicle generic ATF's either though. Something sketchy about the Supertech version of that compared to say ST DexVI IMO. At least Maxlife is a name brand with many manufacturer specs on the bottle.
The original TES-295 fluid "Castrol Transynd" had a Dexron IIIG licence/approval at one time. TES-295 being a Group IV (PAO) base ATF.....I think the price is very reasonable!
I got turned-on to this fluid before I ever owed a Allison transmission......I had(Still have actually) an account with a firm that operated a huge fleet of Street Sweepers ranging from 1500 pick-ups all the way up to Class 6 Tractors.
The 1500/2500/3500 trucks were killing transmissions in short order, The 1500 GMC trucks equipped with 4L60E's would average about 500-700 hours before an overhaul. The hack rebuilds they bought would last 1/4 of that if they were lucky. We are now getting to EOL with one blueprinted overhaul along with added cooling capacity using TES-295 fluid.
Gear-set/Planetary failure was quite common as they run in reduction 90% percent of the time in this application (Sweeping streets in 1st & 2nd gear), Coupled that with the converter being unlocked, No air flow, & the immense weight of the Vacuum/Sweeper/Debris collector & the hydraulic system to run it proved to much for conventional Dexron IIIG & IIIH as it would shear down very quickly!
I HAVE to give Dexron VI some credit.....It may start out thinner than Dexron III, But it SURE holds it's viscosity A LOT longer!!! HOWEVER.......TES-295 is the Cadillac of shear stable ATF's in vocational applications per UOA's performed & Planetary Gear-set longevity.
I don't have the formal education like the Tribologist's on this site, Just a ton of practical experience with certain automatic transmissions subjected to duty cycles way outside their intended usage/designed parameters.
Very interesting info, thank you. Is all TES-295 created equally? I see Royal Purple Max ATF meets that requirement.